From b7ddc0528732059fa00a9683dcf0c878192afb1f Mon Sep 17 00:00:00 2001
From: mfranz <mfranz>
Date: Thu, 4 Oct 2007 22:07:37 +0000
Subject: [PATCH] rwy info isn't always available

---
 Nasal/screen.nas | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Nasal/screen.nas b/Nasal/screen.nas
index 13da2c8e3..b220446e4 100644
--- a/Nasal/screen.nas
+++ b/Nasal/screen.nas
@@ -194,6 +194,8 @@ _setlistener("/sim/signals/nasal-dir-initialized", func {
 	settimer(func {
 		setlistener("/sim/atc/runway", func {
 			var rwy = cmdarg().getValue();
+			if (rwy == nil)
+				return;
 			if (!(getprop("/sim/presets/airport-id") == "KSFO" and rwy == "28R"))
 				setprop("/sim/messages/atc", "You are on runway " ~ rwy ~ ".");
 		}, 1);